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Cross section   /krɔs sˈɛkʃən/   Listen
noun
cross section  n.  
1.
A flat plane cutting through a three-dimensional object, usually at right angles to the longest axis of the object.
2.
Any visual representation of a cross section 1, showing the internal structure of the object in the plane of the cross section; as, the technician prepared a series of MRI cross sections of the skull. Note: Different cross sections created by different techniques may show different aspects of internal structure. Thus computerized axial tomography using X-rays shows different structures than are visualized by MRI.
3.
A thin slice of an object made by cutting it transversely; as, to view a cross section of a bacterium with an electron microscope after staining the DNA; cross sections were prepared with a microtome.
4.
A representative sample of a complex group; as, the town contained a cross section of the American population.
5.
(Physics) A measure of the probability that a nucleus will interact in a specified way with a bombarding particle, expressed as the effective area that the nucleus presents to the particle; called also nuclear cross section.



verb
cross section  v. t.  To create one or a series of cross sections 3 by cutting (an object) into thin slices.






Collaborative International Dictionary of English 0.48








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"Cross section" Quotes from Famous Books



... realized the folly of floating individually over our invisible line. Their beams traced paths of destruction like scars across the countryside, but caught less than half a dozen of our gunners all told, for it takes a lot of time to sweep every square foot of a square mile with a beam whose cross section is not more than twenty or twenty-five feet in diameter. Our gunners, completely concealed beneath the foliage of the forest, with weapons which did not reveal their position, as did the flashes and detonation of the Twentieth ...
— The Airlords of Han • Philip Francis Nowlan

... under a Barn, 16 Boxed-up Frame with Straw Covering, 19 Cross Section of the Dosoris Mushroom Cellar, 27 Ground Plan of the Dosoris Cellar, 28 Base-burning Water Heater, 32 Vertical Section of Base-burning Water Heater, 32 Mushroom House Built Against a North-facing Wall, 34 Section of Mrs. Osborne's ...
— Mushrooms: how to grow them - a practical treatise on mushroom culture for profit and pleasure • William Falconer

... construction, and we hope soon to be able to give details of them. Reservoirs (Fig. 6) holding water at high pressure must be placed at intervals, and the pipe, T, carrying high pressure water must run the whole length of the line. Fig. 6 shows a cross section of the rail and carriage, and gives a good idea of the general arrangements. The absence of wheels and of greasing and lubricating arrangements will alone effect a very great saving, as we are informed that on the ...
— Scientific American Supplement, No. 717, September 28, 1889 • Various

... pressure calculated at the rate of 30 lbs. to the square foot is enormous and is provided for by deep wall girders and knee braces which transfer the strain to the columns and to the foundation. The average cross section of the tower is 75 by 85 feet, the floor space of the entire building is 1,080,000 square feet ...
— Marvels of Modern Science • Paul Severing

... essentially of two recording devices—an ordinary phonograph, and a recorder of the Hensen type writing on a rotary glass disc (see Fig. 5, Plate X.). Of the phonograph nothing need be said. The Hensen recorder, seen in cross section in Fig. 3, was of the simplest type. A diaphragm box of the sort formerly used in the phonograph was modified for the purpose. The diaphragm was of glass, thin rubber, or goldbeater's skin. The stylus was attached perpendicularly to the surface ...
— Harvard Psychological Studies, Volume 1 • Various


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